Build 432 of Metatrader 4 adds minor performance tweaks, fixes a few platform registration issues, and offers extra language support. To echo what I previously said, Metaquotes (Metatrader's publisher) recently announced that all builds older than 416 will no longer be supported. See the original release for more details. Brokers will follow suit - OANDA is already dropping support for builds older than 416.

If you are stuck at an older build of Metatrader 4, and would like to upgrade to build 432, which is the latest version (as of this writing), simply follow directions below:

Make sure your Metatrader 4 platform is closed during this procedure

Download the attached file (terminal.exe)

Copy the file you just downloaded, and paste it in your Metatrader 4 root directory (e.g. C:\Program Files\Metatrader4\), replacing the existing terminal.exe.